Gem microscope base



FIG. 1 is a perspective view of a gem microscope having a gem microscopebase;

FIG. 2 is a perspective view of a gem microscope base;

FIG. 3 is a top view of the gem microscope base;

FIG. 4 is a front end view of the gem microscope base;

FIG. 5 is a right side view of the gem microscope base; and,

FIG. 6 is a rear end view of the gem microscope base.

The broken line showing of the microscope is for illustrative purposesonly and forms no part of the claimed design.

The ornamental design for a gem microscope base, as shown and described.